Add blueprint for aes encryption

zk-token-sdk/src/encryption/aes.rs

@@ -0,0 +1,30 @@
+
+
+pub struct AES;
+impl AES {
+    pub fn new() -> AESKey {
+        AESKey
+    }
+
+    pub fn encrypt(sk: &AESKey, amount: u64) -> AESCiphertext {
+        AESCiphertext
+    }
+
+    pub fn decrypt(sk: &AESKey, ct: &AESCiphertext) -> u64 {
+        0_u64
+    }
+}
+
+pub struct AESKey;
+impl AESKey {
+    pub fn encrypt(&self, amount: u64) -> AESCiphertext {
+        AES::encrypt(self, amount)
+    }
+}
+
+pub struct AESCiphertext;
+impl AESCiphertext {
+    pub fn decrypt(&self, sk: &AESKey) -> u64 {
+        AES::decrypt(sk, self)
+    }
+}